Add base64 response attributes to data source (#62)

[devops-rob]

Summary

• Add computed response_base64 and sensitive_response_base64 to the terracurl_request data source for lossless binary response download via RFC 4648 base64 encoding.
• Encode raw response bytes (not the string-coerced body); empty responses encode to "", not "{}".
• Warn when response bytes are not valid UTF-8 so users know to use response_base64.
• Add example, guide note, tests, and CHANGELOG 2.11.0. Closes [Feature request] Download binary files through the data source #62.

Test plan

• golangci-lint run --config=.golangci.yml ./...
• Unit tests for base64 encoding and sensitive routing
• Acceptance tests with binary httpmock payloads

Made with Cursor

[cursor]

Bugbot is not enabled for your account, so this pull request was not reviewed.

Enable Bugbot in the Cursor dashboard to get automatic reviews on future PRs.